Leadsia Launches 3 Voice AI Agents for "Receiving, Making, and Following Up on" Calls – Area Codes Issued Same Day as Application, Operational in as Little as 3 Minutes

Leadsia Inc. (Headquarters: Shibuya-ku, Tokyo; Representative Director: Ryusuke Oka), a developer of AI voice agents, has launched three voice AI agents to automate corporate telephone operations: "SOPHIA," "ALICE," and "LYDIA." Each agent is responsible for "receiving calls," "making calls," and "following up via phone and email," respectively, and users can select and implement only the roles they need. No telephone line construction is required. An area code (e.g., 03, 06) corresponding to the company's location is issued immediately upon application, and the AI becomes operational in as little as 3 minutes. Initial costs are ¥0, with monthly fees starting at ¥29,800.

For Such Problems

Work stops every time the phone rings. Even if reception staff are hired, they quit soon after. A single call received at night or on a holiday might have been a reservation or a business negotiation. We want to make sales calls, but we lack the personnel and time.

For small and medium-sized businesses with limited staff, telephone communication has long been a difficult burden to solve. Leadsia's AI takes on this telephone work by dividing it into three functions: receiving, making, and following up.

Three Voice AI Agents

SOPHIA – Receives Calls: An AI receptionist that responds to incoming calls 24/7/365. While conversing, it checks the calendar and staff shifts in real-time and confirms reservations before ending the call. There is no "I'll call you back." It handles various reservation formats unique to different industries, such as appointment bookings for salons, table management for restaurants, capacity management for classes, and service reception.

ALICE – Makes Calls: An AI that automatically makes sales calls. By entering the company's website URL, the AI reads the content, prepares a sales pitch, and handles everything from dialing lists to setting up appointments.

LYDIA – Follows Up via Phone and Email: An AI that follows up with prospective customers by combining phone calls and emails. It sends emails, tracks opens, and then calls those who opened the emails – this process is automated. (Designed in compliance with the Act on Specified Electronic Mail).

Immediate Changes Upon Implementation

Start using an area code number on the same day

Many services offer 050 numbers for immediate use, but obtaining an area code number (e.g., 03, 06) requires identity verification and a waiting period of several days to 1-2 weeks. Leadsia issues a number with an area code matching the company's location immediately upon application. No telephone line construction or setup by specialized contractors is necessary. The AI begins answering calls and making calls in as little as 3 minutes.

This also prevents lost opportunities during outgoing calls, where recipients might be wary of 050 numbers and not answer.

Natural Conversation That's Hard to Distinguish as AI

"Will it sound unnatural and cause customers to hang up if it's AI?" – Leadsia addresses this concern with actual performance metrics. The following are five indicators from the company's internal measurements.

* Instruction Compliance Rate: 98.4%, Context Retention Accuracy: 94.7%, Response Latency: 0.82 seconds, Interruption Handling: 96.2%, Conversation Naturalness: 4.3/5 (All internal measurements; Conversation Naturalness evaluated by LLM).

Use Only the Roles You Need

Telephone operations have different requirements for "receiving," "making," and "following up." Leadsia has created three separate AI agents instead of packing everything into one multifunctional tool. Stores that only want to automate call reception can use SOPHIA alone, while companies wanting to make sales calls can use ALICE. By using all three in combination, information from received calls can be passed to the sales team, allowing for integrated handling from call reception to sales.

Conversational Structure That Helps Users Realize Their "Wants"

The goal of ALICE and LYDIA is to create a conversational structure where the other party realizes, "I want that." This principle applies to both human sales and AI. ALICE and LYDIA incorporate three globally established theories of sales science into their conversational flow to help the other party realize their needs without feeling pressured.

SPIN Selling (Neil Rackham): Asks questions in the order of Situation, Problem, Implication, and Need-Payoff, allowing the other party to recognize their problem in their own words, leaving no feeling of being sold to.

Pre-Suasion (Robert Cialdini): A person's decision is made in an instant before the main topic. By designing the opening line and context, it creates a state where the other party is receptive.

To Sell Is Human (Daniel Pink): The role of sales is not to push a product but to accompany the customer in discovering problems. Instead of pushing, if it's not a good fit, they back off.

Furthermore, five principles that govern AI conversations are built into the design as constraints: "Choose Hope Over Fear," "Start by Giving," "Choose Cooperation Over Competition," "Work Backwards from the Ideal State," and "See the Whole." These five principles.

People sometimes cross the line due to their mood that day or pressure to meet targets. However, AI with built-in principles consistently adheres to the same principles, regardless of the call number or the recipient. It can execute without wavering – not instilling fear, not pushing sales, and backing off if it's not a good fit. We believe that the ability to consistently reproduce sincerity is an essential value of entrusting sales to AI.

(Conversation Design Philosophy: https://leadsia.ai/blog/conversation-structuring-design-philosophy)

Robust Security Compliant with International Standards

Leadsia implements multi-layered defense against prompt injection attacks (where AI is hijacked by external malicious instructions) for all its products, ensuring secure operations compliant with international security standards (OWASP, NIST, etc.).

(Security Design: https://leadsia.ai/blog/prompt-injection-defense-architecture)

Launch Date and Pricing

Launch Date: July 3, 2026

Price: Initial cost ¥0 / Monthly fee from ¥29,800

(Varies by product and plan)

You can try out actual AI conversations with the experience demo on the official website.

Company Overview

Company Name: Leadsia Inc.

Location: 18F, Yebisu Garden Place Tower, 4-20-3 Yebisu, Shibuya-ku, Tokyo 150-6018

Representative: Ryusuke Oka, Representative Director

Business Activities: Development and provision of telephone AI agent SaaS equipped with voice AI intelligence.

URL: https://leadsia.ai